Display device

ABSTRACT

A display device comprises scan lines on a insulating substrate, signal lines intersecting with the scan lines with an insulating film interposed therebetween, a display area comprising pixel electrodes connected to the signal lines, a scan line driver circuit connected to the scan lines, a signal line driver circuit connected to the signal lines. The scan line driver circuit and the signal line driver circuit are mounted directly on the insulating substrate outside of the display area and close to one side of the display area. Lines connecting the scan line driver circuit and the signal line driver circuit are formed in an area in which the scan line driver circuit and the signal line driver circuit are mounted.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a display device which is driven bydriver circuits and more particularly to a preferred display device thatis applied to a liquid crystal display device.

2. Related Background Art

Display devices which are employed in conventional liquid crystaldisplay monitor devices or notebook computers and the like require adisplay pixel count of 480×640 even for a small VGA (Video GraphicArray) mode display device, and require drive signal lines pertaining toseveral hundred levels. Where active matrix drive-type display devicesare concerned, a plurality of respective driver circuits is needed todrive the sources or gates of the thin film transistors. Accordingly,the driver circuits or TCPs (Tape Carrier Packages) which afford aconnection to the driver circuits are disposed on extending lines on thesame side of the drive signal lines within the display region.

In small and medium display devices such as those in cellulartelephones, PDAs (Personal Digital Assistants) and the like which haveachieved rapid growth in recent years as application fields for liquidcrystal display devices, there are cases of there being one drivercircuit for the drive of the source lines and gate lines due to therelatively small display pixel count. However, in this case, withmethods that involve the placement of TCPs or driver circuits onextending lines of the drive signal lines of the display region as perthe prior art, there have been problems such as the great complicationsinvolved in implementing the miniaturization of the display device. Incases where there is a concentration of the driver circuits, and theflexible substrates that supply a potential from outside the liquidcrystal panels to these driver circuits, and so forth, in the vicinityof one side of the display region, and, at the same time, the sideperiphery region whereon these driver circuits and flexible substratesand so forth are mounted which excludes the display region is reduced,the layout of the wiring from the driver circuits to the display region,the placement of transfer electrodes that supply a potential to theopposing electrodes of the opposing substrate and of cutting or overlapmarks, and the placement of the input/output terminals of the drivercircuits and the wiring that is connected to these terminals, and soforth, is problematic. There has also been the problem of the wiringresistance required for the display characteristics not being satisfiedor the manufacturing yield being reduced.

SUMMARY OF THE INVENTION

In view of the foregoing problems, it is an object of the presentinvention to provide a display device that makes miniaturizationpossible without there being a reduction in the display characteristicsand the manufacturing yield.

The first display device according to the present invention is a displaydevice having scan lines on a insulating substrate; signal linesintersecting with the scan lines with an insulating film interposedtherebetween; a display area comprising pixel electrodes connected tothe signal lines; a scan line driver circuit connected to the scanlines; a signal line driver circuit connected to the signal lines,wherein the scan line driver circuit and the signal line driver circuitare mounted directly on the insulating substrate outside of the displayarea and close to one side of the display area, and lines connecting thescan line driver circuit and the signal line driver circuit are formedin an area in which the scan line driver circuit and the signal linedriver circuit are mounted.

The second display device according to the present invention is adisplay device according to the first display device, wherein at least apart of lines connecting the scan line driver circuit and the scan linesin the display area is formed in an area in which the signal line drivercircuit is mounted.

The third display device according to the present invention is a displaydevice according to the first display device, wherein at least a part oflines connecting the signal line driver circuit and the signal lines inthe display is formed in an area in which the scan line driver circuitis mounted.

The fourth display device according to the present invention is adisplay device according to the first display device, wherein linesconnecting the scan line driver circuit and the scan lines intersectwith lines connecting the signal line driver circuit and the signallines in the display area with a insulating film interposedtherebetween.

The fifth display device according to the present invention is a displaydevice according to the first is display device, wherein a ratio of aline width to a space between lines is a predetermined value insubstantially all area in which lines connecting the scan line drivercircuit and the scan lines in the display area are formed.

The sixth display device according to the present invention is a displaydevice according to the first display device, wherein a ratio of a linewidth to a line interval is a predetermined value in substantially allarea in which lines connecting the signal line driver circuit and thesignal lines in the display area are formed.

The seventh display device according to the present invention is adisplay device having scan lines on a insulating substrate; signal linesintersecting with the scan lines with a insulating film interposedtherebetween; a display area comprising pixel electrodes connected tothe signal lines; a scan line driver circuit connected to the scanlines; a signal line driver circuit connected to the signal lines; anopposing substrate opposite to the insulating substrate, wherein thescan line driver circuit and the signal line driver circuit are mounteddirectly on the insulating substrate outside of the display area andclose to one side of the display area, and a transfer electrode on theinsulating substrate for supplying a potential to an opposite electrodeon the opposing substrate is formed close to a side opposite to the oneside of the display area to which the scan line driver circuit and thesignal line driver circuit are mounted close.

The eighth display device according to the present invention is adisplay device according to the seventh display device, wherein linesconnecting the scan line driver circuit and the signal line drivercircuit are formed in an area in which the scan line driver circuit andthe signal line driver circuit are mounted.

The ninth display device according to the present invention is a displaydevice having scan lines on a insulating substrate; signal linesintersecting with the scan lines with a insulating film interposedtherebetween; a display area comprising pixel electrodes connected tothe signal lines; a scan line driver circuit connected to the scanlines; a signal line driver circuit connected to the signal lines; aflexible substrate providing a scan potential to the scan line circuitand a signal potential to the signal line circuit from outside, whereinthe scan line driver circuit and the signal line driver circuit aremounted directly on the insulating substrate outside of the display areaand close to one side of the display area, and

-   -   a common alignment mark is formed for mounting the scan line        driver circuit and the signal line driver circuit on the        insulating substrate and mounting the flexible substrate on the        insulating substrate.

The tenth display device according to the present invention is a displaydevice having scan lines on a insulating substrate; signal linesintersecting with the scan lines with a insulating film interposedtherebetween; a display area comprising pixel electrodes connected tothe signal lines; a scan line driver circuit connected to the scanlines; a signal line driver circuit connected to the signal lines; aflexible substrate providing a scan potential to the scan line circuitand a signal potential to the signal line circuit from outside, whereinthe scan line driver circuit and the signal line driver circuit aremounted directly on the insulating substrate outside of the display areaand close to one side of the display area, and terminals on theinsulating substrate connecting the flexible substrate and the scan linedriver circuit or the signal line driver circuit, and lines connectingterminals of the flexible substrate and the scan line driver circuit orthe signal line driver circuit, are formed wider with the longer lines.

The eleventh display device according to the present invention is adisplay device having a display area comprising a plurality of pixels;scan lines on a insulating substrate; signal lines intersecting with thescan lines with a insulating film interposed therebetween; pixelelectrodes connected to the signal lines; a scan line driver circuitconnected to the scan lines; a signal line driver circuit connected tothe signal lines; a flexible substrate providing a potential scan to thescan line circuit and a potential signal to the signal line circuit fromoutside, wherein the scan line driver circuit and the signal line drivercircuit are mounted directly on the insulating substrate outside of thedisplay area and close to one side of the display area, and a dummyterminal, which is not connected to the scan line driver circuit nor thesignal line driver circuit, is formed between or at the outermost sideof terminals on the insulating substrate connecting the flexiblesubstrate and the scan line driver circuit or the signal line drivercircuit.

The twelfth display device according to the present invention is adisplay device having an opposing substrate opposite to a insulatingsubstrate with liquid crystals interposed therebetween; a plurality ofliquid crystal panels formed in the opposing substrate and theinsulating substrate, wherein an alignment mark or a mark forconfirmation after alignment is formed on the opposing substrate forcutting a liquid crystal panel off the opposing substrate and theinsulating substrate.

The present invention will become more fully understood from thedetailed description given hereinbelow and the accompanying drawingswhich are given by way of illustration only, and thus are not to beconsidered as limiting the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view of a liquid crystal display device according tothe first embodiment of the present invention.

FIG. 2 is a cross-sectional view along line A—A in FIG. 1.

FIG. 3 is a plan view of a liquid crystal display device according tothe second embodiment of the present invention.

FIG. 4 is a plan view of a liquid crystal display device according tothe third embodiment of the present invention.

FIG. 5 is a plan view of a liquid crystal display device according tothe fourth embodiment of the present invention.

FIG. 6 is another plan view of a liquid crystal display device accordingto the fourth embodiment of the present invention.

FIG. 7 is a plan view of a liquid crystal display device according tothe fifth embodiment of the present invention.

FIG. 8 is another plan view of a liquid crystal display device accordingto the fifth embodiment of the present invention.

FIG. 9 is another plan view of a liquid crystal display device accordingto the fifth embodiment of the present invention.

FIG. 10 is a plan view of a liquid crystal display device according tothe sixth embodiment of the present invention.

FIG. 11 is another plan view of a liquid crystal display deviceaccording to the sixth embodiment of the present invention.

FIG. 12 is an explanatory view of a liquid crystal display deviceaccording to the seventh embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

First Embodiment

A first embodiment of the present invention will be described by meansof FIGS. 1 and 2. FIG. 1 is a planar view of the liquid crystal displaydevice according to the first embodiment of the present invention, andFIG. 2 is a cross-section along the line A—A in FIG. 1.

In FIGS. 1 and 2, 1 denotes an insulating substrate constituted by aglass substrate, for example; 2 denotes an opposing substrate; 3 denotesa display region that comprises pixel electrodes, and so forth; 4denotes a scan line driver circuit; 5 denotes a signal line drivercircuit; 6 denotes a group of lines that connects scan lines on one sideof the display region and a scan line driver circuit; 7 denotes a groupof lines that connects scan lines on a side that lies opposite to theone side of the display region and the scan line driver circuit; 8denotes a group of lines that connects the signal lines of the displayregion and the signal line driver circuit; 9 denotes connecting linesthat connects the scan line driver circuit and the signal line drivercircuit; 10 denotes driver-circuit connecting terminals which are formedon the insulating substrate; 11 denotes a sealing material; 12 denotesconnection material; and 13 denotes liquid crystals. Further, in thisspecification, ‘a group of lines’ indicates an arbitrary number of linessuch as scan lines or signal lines.

As shown in FIGS. 1 and 2, display material such as liquid crystals 13and the like, for example, is first filled and sealed with sealant 11between the insulating substrate 1 and the opposing substrate 2, andthen driver circuits 4 and 5, which drive a liquid crystal displaydevice, are directly mounted by means of connection material 12 on theinsulating substrate 1 in a region excluding the display area and beingin the vicinity of an arbitrary side of the display region. In the caseof a so-called double-sided input in which scan lines 6 and 7, which areconnected from the scan line driver circuit 4 to the display region, forexample, are connected to one side of the display region and to anotherside opposite to the one side, at least a part of the group of scanlines 6, which is connected to one side of the display region, is formedin a region on the insulating substrate in which the signal line drivercircuit is mounted so as to detour around the group of signal lines 8that connects the signal line driver circuit and the signal lines of thedisplay region, and the section of the connection between the group ofsignal lines 8 and the signal line driver circuit. Further, at least apart of the connecting wiring 9 that connects the scan line drivercircuit 4 and the signal line driver circuit 5 is formed in a region onthe insulating substrate in which the driver circuits 4 and 5 aremounted.

As a result of the above constitution, in the case of a liquid crystaldisplay device in which a scan line driver circuit and a signal linedriver circuit are mounted directly on an insulating substrate close toone side of a display region, the display device can be miniaturized bymaking the wiring regions excluding the mount regions of the drivercircuits extremely small. Further, in the present embodiment, an exampleis illustrated in which a constitution for the group of scan lines 6 anda constitution for the driver circuit connecting wiring 9 are bothapplied, but such constitutions may be employed independently. Further,in the present embodiment, a constitution is illustrated in which atleast a part of the group of scan lines connected to one side of thedisplay region is formed in a region on the insulating substrate inwhich the signal line driver circuit is mounted. However, even if atleast a part of the group of signal lines 8, which connects the signalline driver circuit and the signal lines of the display region, isformed in a region on the insulating substrate in which the scan linedriver circuit is mounted so as to make a detour around the group ofscan lines 7 that connects the scan line driver circuit and the scanlines of a side opposite to the one side of the display region, and thesection of the connection between the group of scan lines 7 and the scanline driver circuit, the display device can be miniaturized in the samemanner as described above.

Second Embodiment

The second embodiment of the present invention will now be described byreferring to FIG. 3. FIG. 3 is a planar view of the liquid crystaldisplay device of the second embodiment of the present invention. InFIG. 3, the same reference numerals is assigned to constituent partswhich are the same as those in FIGS. 1 and 2, and a description istherefore provided with respect to the differences. In FIG. 3, 14denotes crossover points between the group of scan lines 6 and the groupof signal lines 8. In the present embodiment, unlike the constitution asin the first embodiment above in which at least a part of the group ofscan lines, which is connected to one side of the display region, isformed in a region on the insulating substrate in which the signal linedriver circuit is mounted, the group of scan lines 6 and the group ofsignal lines 8 are formed so as to intersect at the crossover points 14in a region of overlap between the insulating substrate 1 and theopposing substrate 2. In this case, because the group of scan lines 6and the group of signal lines 8 are formed so as to intersect via aninsulation film or the like, for example, a short circuit between thesegroups of lines can be prevented.

As a result of such a constitution, similarly to the first embodiment,in the case of a liquid crystal display device in which a scan linedriver circuit and a signal line driver circuit are mounted directly onan insulating substrate close to one side of a display region, thedisplay device can be miniaturized. Further, the display device can beminiaturized further by also applying the constitution of the drivercircuit connecting wiring 9 according to the first embodiment describedabove to the present embodiment. Further, in the present embodiment, aconstitution is illustrated in which the group of scan lines 6 and thegroup of signal lines 8 intersect in a region of overlap between theinsulating substrate 1 and the opposing substrate 2. However, aconstitution is also possible in which the group of scan lines 6 andgroup of signal lines 8 intersect in a region on the insulatingsubstrate 1 in which there is no overlap with the opposing substrate 2.

Third Embodiment

The third embodiment of the present invention will now be described bymeans of FIG. 4. FIG. 4 is a planar view of the liquid crystal displaydevice according to the third embodiment of the present invention. InFIG. 4, the same reference numerals are assigned to constituent partswhich are the same as those of FIGS. 1 to 3, and therefore a descriptionwill be provided with respect to the differences. In FIG. 4, 15 denotestransfer electrodes for supplying an opposite potential (commonpotential) to the opposing substrate, and 16 is common potential supplywiring for supplying an opposite potential (common potential) to thetransfer electrodes 15. As shown in FIG. 4, the present embodiment issuch that wiring such as the group of scan lines 6 and 7 and the groupof signal lines 8 is not present, and hence the transfer electrodes 15,which supply an opposite potential (common potential) from outside theliquid crystal panels to the opposing substrate via a driver circuit areformed with a relatively high degree of freedom in the vicinity of oneside on the insulating substrate opposite to the one side on which thedriver circuits are mounted. In cases where this common potential mustalso be inputted to the display region, the difference in drivecapacity, which depends on the distance from the driver circuit, shouldbe minimized, and it is desirable that this common potential supplywiring be formed thickly and be formed on the four sides of the displayregion so as to surround the display region.

As a result of such a constitution, an enlargement of the display devicecaused by the formation of the transfer electrodes can be suppressed andthe display device can therefore be miniaturized. Further, the displaydevice can be miniaturized further by suitably combining theconstitution of the driver circuit connecting wiring of the above firstand second embodiments or the constitution of the scan-line or group ofsignal lines with the present embodiment.

Fourth Embodiment

The fourth embodiment of the present invention will be described bymeans of FIGS. 5 and 6. FIG. 5 is a planar view of the liquid crystaldisplay device according to the fourth embodiment of the presentinvention, and FIG. 6 is another planar view of the liquid crystaldisplay device according to the fourth embodiment of the presentinvention. In FIGS. 5 and 6, the same reference numerals are assigned tothe constituent elements which are the same as those in FIGS. 1 to 4,and therefore a description will be provided with respect to thedifferences. In FIGS. 5 and 6, 17 is a flexible substrate (FPC: FlexiblePrint Circuit) that supplies a scan line potential from outside theliquid crystal panel; 18 is a flexible substrate (FPC) that supplies asignal line potential from outside the liquid crystal panel; 19 areconnecting terminals on the insulating substrate for the FPCs 17 and 18;and 20 are mounting overlap marks on the insulating substrate for themounting of the driver circuits or FPCs.

As shown in FIG. 5, the present embodiment is constituted so as topermit further miniaturization of the display device by mounting thedriver circuits 4 and 5 and the FPCs 17 and 18 on an end of theinsulating substrate in the vicinity of one side and a common alignmentmark 20 are shared for mounting the driver circuits and FPCs. In caseswhere additional mount precision is sought for the mounting of thedriver circuits or FPCs onto the insulating substrate, an alignment markis desirably also provided in the gap between the driver circuits orFPCs. Due to restrictions posed by mounted devices or the problem ofmount precision, some of the alignment marks 20 could also be formed inthe gap between the driver circuits which have then been mounted on theinsulating substrate, for example, as shown in FIG. 6.

In addition to the above-described alignment marks, any kind of testmarks of a display device test process, and so forth, could also beutilized as the marks 20 according to the present embodiment. Inaddition, the display device can be miniaturized further by suitablycombining the constitutions of the driver circuit connecting wiringaccording to the above first to third embodiments or the constitutionsof the scan-line or group of signal lines s, with the presentembodiment.

Fifth Embodiment

The fifth embodiment of the present invention will now be described bymeans of FIGS. 7 to 9. FIG. 7 is a planar view of the liquid crystaldisplay device according to the fifth embodiment of the presentinvention. FIG. 8 is another planar view of the liquid crystal displaydevice according to the fifth embodiment of the present invention. FIG.9 is another planar view of the liquid crystal display device accordingto the fifth embodiment of the present invention. In FIGS. 7 to 9, thesame reference numerals are assigned to the constituent parts which arethe same as those in FIGS. 1 to 6, and a description is thereforeprovided with respect to the differences. In FIGS. 7 to 9, 21 isconnecting lines that connects the connecting terminals of the drivercircuits and of the FPCs, while 22 denotes FPC dummy terminals on theinsulating substrate.

In FIG. 7, s1 to s4 denote the terminal width of each FPC connectingterminal 19 on the insulating substrate, terminals with the samereference numerals being terminals that have the same width, where p1denotes the mounting pitch of the terminals. In FIG. 7, the mountingpitch of the FPC connecting terminals 19 on the insulating substrate isp1. In order to reduce the wiring resistance, the terminals connected tolong lines are afforded a larger terminal width as well as a larger linewidth, whereby a lower resistance is achieved. As a result of such aconstitution, it is possible to minimize the difference in wiringresistance of the wiring.

In addition, in FIG. 8, s1 denotes the terminal width of the FPCconnecting terminals 19 on the insulating substrate, while p1 to p4denote the mounting pitch of each terminal, terminals with the samereference numerals being terminals that have the same pitch. In FIG. 8,the terminal width of the FPC connecting terminals 19 on the insulatingsubstrate is formed as s1. In order to reduce the wiring resistance, theterminals connected to long lines are afforded a smaller terminal pitch,whereby a lower resistance is achieved. As a result of such aconstitution, it is possible to minimize the difference in wiringresistance of the wiring.

Further, in FIG. 9, p1 denotes the mounting width of the FPC connectingterminals 19 on the insulating substrate, while s1 denotes the terminalwidth. In FIG. 9, by making the terminal width and terminal pitch of theFPC connecting terminals 19 on the insulating substrate the same andforming dummy terminals 22 that are not connected to the scan linedriver circuit and the signal line driver circuit on one side or bothsides of the terminals with a short wiring length, and the like, it ispossible to minimize the difference in wiring resistance of the wiring.Further, by also forming the dummy terminals 22 on the outermost side ofthe FPC connecting terminals 19, these dummy terminals 19 can also beused as repair terminals for cases where the FPC connecting terminals 19exhibit problems such as patterning defects or severance, and so forth.

As a result of such a constitution, in a liquid crystal display devicein which a scan line driver circuit and a signal line driver circuit aremounted directly onto an insulating substrate in the vicinity of oneside of a display region, and in which scan lines for receiving signalinputs from outside and a signal line potential supply FPC are mounted,the difference in wiring resistance of the connecting wiring of theconnecting terminals of the driver circuits and the FPCs, which poses aproblem in attempts to miniaturize the display device, can be minimized,whereby the display quality of the display device can be improved.Further, the constitution of the present embodiment can be used foreither one of: the connecting wiring between the scan line drivercircuit and the scan line potential supply FPC, and the connectingwiring between the signal line driver circuit and the signal linepotential supply FPC. Further, by combining the constitution of thefourth embodiment above with the present embodiment, the display devicecan be miniaturized and the display quality can be improved.

Sixth Embodiment

The sixth embodiment of the present invention will now be described bymeans of FIGS. 10 and 11. FIG. 10 is a planar view of the liquid crystaldisplay device according to the sixth embodiment of the presentinvention. FIG. 11 is another planar view of the liquid crystal displaydevice according to the sixth embodiment of the present invention. InFIGS. 10 and 11, the same reference numerals have been assigned toconstituent parts which are the same as those in FIGS. 1 to 9, and adescription is therefore provided with respect to the differences. InFIGS. 10 and 11, 23 denotes wiring that connects the display region andthe scan line driver circuit, while 24 denotes wiring that connects thedisplay region and the signal line driver circuit.

In FIG. 10, L1 to L5 denote the line width in the respective regions ofthe scan lines 23, and M1 to M5 denote the intervals in respectiveregions of the scan lines 23. In FIG. 10, the scan lines 23 arepatterned so that the ratio L/M between the line width and the lineinterval in the respective regions of the wiring 23 is equal to apredetermined value (L1/M1=L2/M2=L3/M3=L4/M4=L5/M5=a). Further,similarly also in FIG. 11, L1 to L3 denote the line width in respectiveregions of the signal lines 24, and M1 to M3 denote the intervals inrespective regions of the signal lines 24. The signal lines 24 arepatterned so that the ratio L/M between the line width and the lineinterval in the respective regions of the wiring 24 is equal to apredetermined value (L1/M1=L2/M2=L3/M3=b). Further, in the presentembodiment, the wiring 23 that connects the display region and the scanline driver circuit in FIG. 10 is connected to only one side of thedisplay region, but, similarly to the embodiment described above, couldalso be connected to an opposite side.

As a result of such a constitution, in a liquid crystal display devicein which a scan line driver circuit and a signal line driver circuit aremounted directly onto an insulating substrate in the vicinity of oneside of a display region, problems with disconnection and short-circuitcan be prevented by applying a predetermined ratio between the linewidth and the line interval which serves to lower the rate of occurrenceof disconnection defects and short-circuit defects to substantially theentire wiring region. Furthermore, by suitably combining the above firstto fifth embodiments with the present embodiment, the display device canbe miniaturized and severed line defects and short-circuit defects canalso be suppressed, meaning that it is possible to obtain a displaydevice with a high manufacturing yield.

Seventh Embodiment

The seventh embodiment of the present invention will now be described bymeans of FIG. 12. FIG. 12 is an explanatory view of the liquid crystaldisplay device according to the seventh embodiment of the presentinvention. In FIG. 12, the same reference numerals are assigned to theconstituent parts which are the same as those in FIGS. 1 to 11, and adescription is therefore provided with respect to the differences. InFIG. 12, 25 denotes a liquid crystal panel formation region, 26 denotescutting lines, and 27 denotes cutting marks.

In FIG. 12, after the insulating substrate 1 and the opposing substrate2 have been pasted together, cutting marks for cutting off individualliquid crystal panels, or marks for confirming the cutting accuracy, orthe like, are formed on the opposing substrate 2. Conventionally, marks27 have been formed on the insulating substrate 1 because of ease ofpattern formation or problems with pattern accuracy; however, it hasrequired some region for the mark formation due to other patternrestrictions, and the like. The formation of the marks 27 on theopposing substrate 2 as per the present embodiment permitsminiaturization of the display device and obviates the need forpatterning on the insulating substrate, meaning that fabrication can beperformed easily without the generation of additional steps (forexample, an increase in the short number and an increase in the shortsize of the photolithographic process, and so forth) in the process offabricating the insulating substrate.

Further, as a result of suitably combining the constitutions of theabove first to sixth embodiments with the present embodiment, not onlycan the display device be further miniaturized, an increase in thedisplay quality and the manufacturing yield, and so forth, is alsopermitted.

A description has been provided hereinabove in the above first toseventh embodiments for a liquid crystal display device that comprisesdriver circuits for driving the liquid crystal display device or FPCsfor receiving signal inputs from outside. However, the present inventionis not limited to or by such a liquid crystal display device, and it isobvious that no impediment is caused even if the present invention isapplied to a display device that uses electroluminescent elements and soforth or indeed to every kind of display device that comprises drivercircuits or FPCs for receiving signal inputs from outside.

From the invention thus described, it will be obvious that theembodiments of the invention may be varied in many ways. Such variationsare not to be regarded as a departure from the spirit and scope of theinvention, and all such modifications as would be obvious to one skilledin the art are intended for inclusion within the scope of the followingclaims.

1. A display device, comprising: scan lines on an insulating substrate;signal lines intersecting with the scan lines with an insulating filminterposed therebetween; a display area comprising pixel electrodesconnected to the signal lines; a scan line driver circuit connected tothe scan lines; and a signal line driver circuit connected to the signallines, wherein the scan line driver circuit and the signal line drivercircuit are mounted directly on the insulating substrate outside of thedisplay area and close to one side of the display area, lines connectingthe scan line driver circuit and the signal line driver circuit areformed in an area in which the scan line driver circuit and the signalline driver circuit are mounted, and at least a part of lines connectingthe scan line driver circuit and the scan lines in the display area isformed in an area in which the signal line driver circuit is mounted. 2.The display device according to claim 1, wherein at least a part oflines connecting the signal line driver circuit and the signal lines inthe display is formed in an area in which the scan line driver circuitis mounted.
 3. The display device according to claim 1, wherein linesconnecting the scan line driver circuit and the scan lines intersectwith lines connecting the signal line driver circuit and the signallines in the display area with a insulating film interposedtherebetween.
 4. The display device according to claim 1, wherein aratio of a line width to a space between lines is a predetermined valuein substantially all area in which lines connecting the scan line drivercircuit and the scan lines in the display area are formed.
 5. Thedisplay device according to claim 1, wherein a ratio of a line width toa line interval is a predetermined value in substantially all area inwhich lines connecting the signal line driver circuit and the signallines in the display area are formed.
 6. A display device, comprising:scan lines on an insulating substrate; signal lines intersecting withthe scan lines with an insulating film interposed therebetween; adisplay area comprising pixel electrodes connected to the signal lines;a scan line driver circuit connected to the scan lines; and a signalline driver circuit connected to the signal lines, wherein the scan linedriver circuit and the signal line driver circuit are mounted directlyon the insulating substrate outside of the display area and close to oneside of the display area, lines connecting the scan line driver circuitand the signal line driver circuit are formed in an area in which thescan line driver circuit and the signal line driver circuit are mounted,and at least a part of lines connecting the signal line driver circuitand the signal lines in the display is formed in an area in which thescan line driver circuit is mounted.
 7. The display device according toclaim 6, wherein at least a part of lines connecting the scan linedriver circuit and the scan lines in the display area is formed in anarea in which the signal line driver circuit is mounted.
 8. The displaydevice according to claim 6, wherein lines connecting the scan linedriver circuit and the scan lines intersect with lines connecting thesignal line driver circuit and the signal lines in the display area witha insulating film interposed therebetween.
 9. The display deviceaccording to claim 6, wherein a ratio of a line width to a space betweenlines is a predetermined value in substantially all area in which linesconnecting the scan line driver circuit and the scan lines in thedisplay area are formed.
 10. The display device according to claim 6,wherein a ratio of a line width to a line interval is a predeterminedvalue in substantially all area in which lines connecting the signalline driver circuit and the signal lines in the display area are formed.